html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #E08E79;
  margin: 0;
  padding: 0;
}

.help {
  position: absolute;
  top: 0;
  left: 0;
  font-family: Verdana, Geneva, Tahoma, sans-serif;
  padding: 15px;
}

.gameover {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  background: rgba(0, 0, 0, 0.5);
  display: none;
}

.gameover h1 {
  text-align: center;
  font-family: Verdana, Geneva, Tahoma, sans-serif;
  font-size: 70px;
  color: white;
  text-transform: uppercase;
}

.gameover button {
  font-family: Verdana, Geneva, Tahoma, sans-serif;
  font-size: 30px;
  text-transform: uppercase;
  display: block;
  margin: auto;
}